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| Nanoporous silicon spheres preparation via a controllable magnesiothermic reduction as anode for Li-ion batteries | |
| Yang, Zongxian1,2; Du, Yu1,2; Hou, Guolin1; Ouyang, Yuge1,2; Ding, Fei1; Yuan, Fangli1,3 | |
| 2020 | |
| Source Publication | ELECTROCHIMICA ACTA
 |
| ISSN | 0013-4686 |
| Volume | 329Pages:10 |
| Abstract | Magnesiothermic reduction is a facile and utility method for scalable synthesis of porous silicon. However, the severe heat accumulation during this process can lead to the porous structure collapse. In this work, we present an applied method for achieving a controllable magnesiothermic reduction through regulating the reaction rate by merely adjusting the particle size of magnesium. The impact effect of magnesium size on the reaction process is also systematically studied. It is found that the heat accumulation can be relieved when the size of magnesium is > 800 mu m (l-Mg). The obtained reduced silicon (l-rSi) can basically maintain the spherical shape and particle size of raw SiO2 and form a highly-developed nano-porous structure. It exhibits a high initial discharge capacity of 3191 m Ah g(-1) and coulombic efficiency of 80.9% with superior cycling stability and rate capability. Moreover, when the obtained l-rSi is added in commercial graphite with only 10 wt%, the capacity of l-rSi/commercial graphite composite increases to 670 m Ah g(-1), which is about 2 times that of commercial graphite, manifesting great potential for industrial application. Our work can be a guide to fabricate nanostructure silicon materials through magnesiothermic reductions for the silicon-based anode of lithium-ion batteries. (C) 2019 Elsevier Ltd. All rights reserved. |
| Keyword | Magnesiothermic reduction Porous silicon Mechanism research Ball milling Li-ion battery |
| DOI | 10.1016/j.electacta.2019.135141 |
| Language | 英语 |
| WOS Keyword | CORE-SHELL STRUCTURE ; AT-CARBON COMPOSITE ; POROUS SILICON ; HIGH-PERFORMANCE ; SCALABLE SYNTHESIS ; ELECTROCHEMICAL PERFORMANCE ; PRACTICAL APPLICATION ; HIGH-ENERGY ; NANOPARTICLES ; ELECTRODES |
| Funding Project | National Natural Science Foundation of China (NSFC)[21805282] ; National Natural Science Foundation of China (NSFC)[21878312] ; National Natural Science Foundation of China (NSFC)[11535003] ; Beijing Municipal Natural Science Foundation (BNSF)[2184126] ; Fund of State Key Laboratory of Multi-phase Complex Systems[MPCS-2019-A-11] |
| WOS Research Area | Electrochemistry |
| WOS Subject | Electrochemistry |
| Funding Organization | National Natural Science Foundation of China (NSFC) ; Beijing Municipal Natural Science Foundation (BNSF) ; Fund of State Key Laboratory of Multi-phase Complex Systems |
| WOS ID | WOS:000498391900026 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/38291 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Hou, Guolin; Yuan, Fangli |
| Affiliation | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Zhongguancun Beiertiao 1 Hao, Beijing 100190, Peoples R China 2.UCAS, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, 19A Yuquan Rd, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Yang, Zongxian,Du, Yu,Hou, Guolin,et al. Nanoporous silicon spheres preparation via a controllable magnesiothermic reduction as anode for Li-ion batteries[J]. ELECTROCHIMICA ACTA,2020,329:10. |
| APA | Yang, Zongxian,Du, Yu,Hou, Guolin,Ouyang, Yuge,Ding, Fei,&Yuan, Fangli.(2020).Nanoporous silicon spheres preparation via a controllable magnesiothermic reduction as anode for Li-ion batteries.ELECTROCHIMICA ACTA,329,10. |
| MLA | Yang, Zongxian,et al."Nanoporous silicon spheres preparation via a controllable magnesiothermic reduction as anode for Li-ion batteries".ELECTROCHIMICA ACTA 329(2020):10. |
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